The groupe mica includes minerals that include closely related materials having highly perfect basal cleavage.
Some of the mineral characteristics of Biotite
Color- Dark green, Brown, or Black
Streak- White
Transparency- transparent to translucent
Luster- Glossy, Pearly, or vitreous
Cleavage- Perfect in one direction
Fracture- Uneven when seen
Magnetism- None
Hardness- 2.5
Specific- 3.0
Crystal Shape- Monoclinic
Density - 2.8 - 3.4 the average is 3.09
Radioactivity - Barely detectable
Luminescence - Non-Flourescent
Electron Density - Bulk Density
Chemical Formula - K(Mg,Fe)3AiSl3010(OH)2
What is it used for?
Biotite is used for mainly displays un mineral collections and some people say it's a good heat
insulator.
What is it made from?
It is made of Potassium, Magnesium, Aluminum, Iron, Silicon, Hydrogen, Oxygen and Flourine.
Where is it Mined?
It's mined through quarrying and underground mining, depending on how far it is underground. It is found in Ontario, Sicily, and Russia. It is found mainly in Igneous and Metamorphic rocks.
Biotite is a mineral in the group called mica.
The groupe mica includes minerals that include closely related materials having highly perfect basal cleavage.
Some of the mineral characteristics of Biotite
Color - Dark green, Brown, or Black
Streak - White
Transparency - transparent to translucent
Luster - Glossy, Pearly, or vitreous
Cleavage - Perfect in one direction
Fracture - Uneven when seen
Magnetism - None
Hardness - 2.5
Specific - 3.0
Crystal Shape - Monoclinic
Density - 2.8 - 3.4 the average is 3.09
Radioactivity - Barely detectable
Luminescence - Non-Flourescent
Electron Density - Bulk Density
Chemical Formula - K(Mg,Fe)3AiSl3010(OH)2
What is it used for?
Biotite is used for mainly displays un mineral collections and some people say it's a good heat
insulator.
What is it made from?
It is made of Potassium, Magnesium, Aluminum, Iron, Silicon, Hydrogen, Oxygen and Flourine.
Where is it Mined?
It's mined through quarrying and underground mining, depending on how far it is underground. It is found in Ontario, Sicily, and Russia. It is found mainly in Igneous and Metamorphic rocks.
Made By:
Luke Jacoby
Max Reiter
http://en.wikipedia.org/wiki/Mica
http://library.thinkquest.org/05aug/00461/biotite.html
http://webmineral.com/data/Biotite.shtml